Kinematic vehicle seat folding

ABSTRACT

Various vehicle seat improvements are enabled herein. For instance, a seat folding mechanism comprises a first mounting bracket, rotatably attached to a base at a first end of the first mounting bracket, a first end of a connecting rod attached at a second end of the first mounting bracket, opposite the first end of the first mounting bracket, a second mounting bracket, parallel to the first mounting bracket, rotatably attached to the base at a first end of the second mounting bracket, wherein the connecting rod is attached at a second end of the connecting rod to a second end of the second mounting bracket, opposite the first end of the second mounting bracket, a first link arm, rotatably attached at a first end of the first link arm to the first mounting bracket, adjacent to the second end of the first mounting bracket, a first slider, slidably attached to the base, wherein a second end of the first link arm, opposite the first end of the first link arm, is rotatably attached to the first slider, a second link arm, rotatably attached at a first end of the second link arm to the second mounting bracket, adjacent to the second end of the second mounting bracket, and a second slider, slidably attached to the base, wherein a second end of the second link arm, opposite the first end of the second link arm, is rotatably attached to the second slider, whereby sliding of the first slider and the second slider causes the connecting rod to move in height direction.

TECHNICAL FIELD

The present description generally relates to vehicle seats having kinematic folding mechanisms. A vehicle seat can comprise a submarining section to enable optimized folding, for example. The present description also relates to methods for manufacturing kinematic seats.

BACKGROUND

Sport Utility Vehicles (SUVs) and crossovers, also referred to as crossover utility vehicles (CUVs), are becoming increasingly popular over smaller, compact, cars. One of the many benefits of these larger vehicles is the ability to transport more people. For example, some SUVs or CUVs can often safety accommodate seven or even eight passengers. While the ability to move a large quantity of people is important to many, often equally important is the ability to convert a vehicle interior from a “people mover” to a “cargo hauler”. Doing so typically requires removal or stowing of second and/or third-row vehicle seats. A vehicle's overall utility is impacted by how effectively and efficiently second or third-row seats fold and store. Third row seats, for example, should be substantial enough to comfortably accommodate children and adults, while also able to collapse or stow away to maximize cargo capacity.

Existing third-row seats, for example, are often cumbersome and inefficient in that they don't make optimal use of available space. For instance, conventional third row seats often possess a hinged seat back that merely folds the seat back atop a seat bottom without stowing the seat bottom. Such seat bottoms are often floor-mounted or sacrifice valuable space beneath the seat bottom. Other seats have whole-seat tumbling mechanisms, but these are expensive to implement, complex, and do not necessarily maximize space. Some other folding seats have collapsible seat bottoms, but such seats are hinged only at the rear of the seat bottom, meaning that only the front of the seat raises and lowers while the rear hinges. In this regard, the height of the rear of the seat bottom is fixed, which can create an uncomfortable seating position for occupants when the seat is in a seating position. Additional conventional seats have sliding lower cushions which slide back and forth in response to rotational motion of a seat back. This can leave gaps and unnecessarily compress seat cushions. Thus, there exists a need for vehicle seats with an improved folding design.

The above-described background relating to vehicle seats is merely intended to provide a contextual overview of some current issues and is not intended to be exhaustive. Other contextual information may become further apparent upon review of the following detailed description.

SUMMARY

The following summary is a general overview of various embodiments disclosed herein and is not intended to be exhaustive of limiting upon the disclosed embodiments. Embodiments are better understood upon consideration of the detailed description below in conjunction with the accompanying drawings and claims.

It is an object of the present description to provide for an improved vehicle seat folding mechanism having an improved folding or stowing features.

In one embodiment, a seat folding mechanism is described herein. The seat folding mechanism comprises a first mounting bracket, rotatably attached to a base at a first end of the first mounting bracket, a first end of a connecting rod attached at a second end of the first mounting bracket, opposite the first end of the first mounting bracket, a second mounting bracket, parallel to the first mounting bracket, rotatably attached to the base at a first end of the second mounting bracket, wherein the connecting rod is attached at a second end of the connecting rod to a second end of the second mounting bracket, opposite the first end of the second mounting bracket, a first link arm, rotatably attached at a first end of the first link arm to the first mounting bracket, adjacent to the second end of the first mounting bracket, a first slider, slidably attached to the base, wherein a second end of the first link arm, opposite the first end of the first link arm, is rotatably attached to the first slider, a second link arm, rotatably attached at a first end of the second link arm to the second mounting bracket, adjacent to the second end of the second mounting bracket, and a second slider, slidably attached to the base, wherein a second end of the second link arm, opposite the first end of the second link arm, is rotatably attached to the second slider, whereby sliding of the first slider and the second slider causes the connecting rod to move in height direction.

In another embodiment, a seat stowing mechanism is described herein. The seat stowing mechanism comprises a seat base comprising a pair of seat rails, a first mounting bracket, rotatably coupled at a first end of the first mounting bracket to a first seat rail of the pair of seat rails, a first end of a connecting rod coupled to the first mounting bracket at a second end of the first mounting bracket, opposite the first end of the first mounting bracket, a second mounting bracket, parallel to the first mounting bracket, rotatably coupled at a first end of the second mounting bracket to a second seat rail of the pair of seat rails, wherein the connecting rod is coupled at a second end of the connecting rod to a second end of the second mounting bracket, opposite the first end of the second mounting bracket, a first link arm, rotatably coupled at a first end of the first link arm to the first mounting bracket, adjacent to the second end of the first mounting bracket, a first slider, slidably coupled to and substantially coplanar with the seat base, wherein a second end of the first link arm, opposite the first end of the first link arm, is rotatably coupled to the first slider, a second link arm, rotatably coupled at a first end of the second link arm to the second mounting bracket, adjacent to the second end of the second mounting bracket, a second slider, slidably coupled to and substantially coplanar with the seat base, wherein a second end of the second link arm, opposite the first end of the second link arm, is rotatably coupled to the second slider, whereby sliding of the first slider and the second slider causes the connecting rod to move in height direction, and a seat pan disposed atop the connecting rod.

In a further embodiment, a method for making a collapsible seat base is described herein. The method comprises slidably attaching a first upper seat rail to a first lower seat rail, slidably attaching a second upper seat rail to a second lower seat rail, pivotally attaching a first submarine bracket to an inner side of the first lower seat rail at a first end of the first submarine bracket, pivotally attaching a second submarine bracket to an inner side of the second lower seat rail at a first end of the second submarine bracket, attaching a first end of a submarine tube to the first submarine bracket at a second end of the first submarine bracket, opposite the first end of the first submarine bracket, and attaching a second end of the submarine tube to the second submarine bracket at a second end of the second submarine bracket, opposite the first end of the second submarine bracket, pivotally attaching a first linkage to the first submarine bracket at a first end of the first linkage and pivotally attaching the first linkage to the first upper seat rail at a second end of the first linkage, and pivotally attaching a second linkage to the second submarine bracket at a first end of the second linkage and pivotally attaching the second linkage to the second upper seat rail at a second end of the second linkage.

DESCRIPTION OF DRAWINGS

Various non-limiting embodiments of the subject disclosure are described with reference to the following figures, wherein like reference numerals refer to like parts throughout unless otherwise specified.

FIG. 1 shows an exemplary implementation of a pair of kinematic vehicle seats in accordance with one or more embodiments described herein.

FIG. 2 shows exemplary components of a kinematic vehicle seat in accordance with one or more embodiments described herein.

FIG. 3 shows exemplary components of a kinematic vehicle seat in accordance with one or more embodiments described herein.

FIG. 4 shows exemplary components of a kinematic vehicle seat in accordance with one or more embodiments described herein.

FIG. 5 shows exemplary components of a kinematic vehicle seat in accordance with one or more embodiments described herein.

FIG. 6 shows exemplary components of a kinematic vehicle seat in accordance with one or more embodiments described herein.

FIG. 7 shows exemplary components of a kinematic vehicle seat in accordance with one or more embodiments described herein.

FIG. 8 shows exemplary components of a kinematic vehicle seat in accordance with one or more embodiments described herein.

FIG. 9 shows exemplary components of a kinematic vehicle seat in accordance with one or more embodiments described herein.

FIG. 10 shows exemplary components of a kinematic vehicle seat in accordance with one or more embodiments described herein.

FIG. 11 shows an exemplary kinematic vehicle seat in accordance with one or more embodiments described herein.

FIG. 12 shows exemplary components of a kinematic vehicle seat in accordance with one or more embodiments described herein.

FIG. 13 shows exemplary components of a kinematic vehicle seat in accordance with one or more embodiments described herein.

FIG. 14 shows exemplary components of a kinematic vehicle seat in accordance with one or more embodiments described herein.

FIG. 15 shows exemplary components of a kinematic vehicle seat in accordance with one or more embodiments described herein.

FIG. 16 shows exemplary components of a kinematic vehicle seat in accordance with one or more embodiments described herein.

FIG. 17 shows exemplary components of a kinematic vehicle seat in accordance with one or more embodiments described herein.

FIG. 18 shows exemplary components of a kinematic vehicle seat in accordance with one or more embodiments described herein.

FIG. 19 shows exemplary components of a kinematic vehicle seat in accordance with one or more embodiments described herein.

FIG. 20 shows exemplary components of a kinematic vehicle seat in accordance with one or more embodiments described herein.

FIG. 21 shows exemplary components of a kinematic vehicle seat in accordance with one or more embodiments described herein.

FIG. 22 shows exemplary components of a kinematic vehicle seat in accordance with one or more embodiments described herein.

FIGS. 23A-23D show exemplary motion of a partially-assembled kinematic vehicle seat in accordance with one or more embodiments described herein.

FIGS. 24A-24D show exemplary motion of a partially-assembled kinematic vehicle seat in accordance with one or more embodiments described herein.

FIG. 25 shows exemplary components of a kinematic vehicle seat in accordance with one or more embodiments described herein.

FIG. 26 shows exemplary components of a kinematic vehicle seat in accordance with one or more embodiments described herein.

FIG. 27 is a block flow diagram for a process for a method for making a collapsible seat base in accordance with one or more embodiments described herein.

DETAILED DESCRIPTION

Various specific details of the disclosed embodiments are provided in the description below. One skilled in the art will recognize, however, that the techniques described herein can in some cases be practiced without one or more of the specific details, or with other methods, components, materials, etc. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring certain aspects.

For uniformity of description, vehicle seats are presumed to be conventionally forward-facing with respect to a vehicle to which they are attached, though embodiments herein do not require such seats to necessarily be forward-facing. As used herein, the Z-axis corresponds to a height direction of a vehicle, the X-axis corresponds to a length direction of a vehicle, and a Y-axis corresponds to a width direction of a vehicle. For example, when the term “up” or “upper” is used to indicate a position or direction, it is intended to mean towards the roof of a vehicle during normal use of the vehicle. Additionally, the term “forward” is used to indicate a relatively frontal position or direction with respect to a vehicle. Likewise, “rear” is used to indicate a relatively rearward position or direction with respect to a vehicle.

With reference to FIG. 1, there is illustrated an exemplary pair of vehicle seats (two of vehicle seat 100). It can be appreciated that each vehicle seat 100 of the pair of vehicle seats are independently operated, though other embodiments can comprise a pair of vehicle seats as an integrated assembly. The vehicle seat 100 can be received in a vehicle (e.g., SUV, CUV, sedan, coupe, convertible, pickup truck, etc.). According to an embodiment, the vehicle seat 100 is configured to be received in a third-row of a vehicle, though the vehicle seat can also be installed in a second-row or first-row of a vehicle.

FIGS. 2-10 illustrate a “buildup” of an exemplary, nonlimiting vehicle seat 100 from a single perspective view. In this regard, the vehicle seat 100 is illustrated in various states of construction/deconstruction in order to illustrate its plurality of components and subcomponents. Therefore, it should be appreciated that some components or subcomponents may not be visible in some drawings, but this does not preclude inclusion of such omitted components or subcomponents since such an omission may only be for visualization purposes.

Turning now to FIG. 2, there is illustrated a lower rail 102 and a lower rail 104 (collectively the “lower rails” or “pair parallel of lower rails”). The lower rails can alternatively be referred to as a base. As depicted, the lower rails can be substantially parallel and coplanar, though other embodiments can comprise lower rails that are not coplanar. For instance, lower rail 102 and lower rail 104 can be located at different heights along the Z-axis to accommodate, for example, a floor structure of a vehicle to which the vehicle seat 100 is attached.

The lower rails can comprise geometry applicable for installation in a vehicle (e.g., a Volvo® XC90). For instance, various holes or slots can be provided in the lower rails to facilitate assembly to a vehicle. Though preferably bolted to a vehicle, the lower rails can alternatively be riveted, welded, or otherwise secure to a vehicle as would be understood by one skilled in the art. Alternatively, lower rails can be manufactured as part of a vehicle floor pan or structure.

The lowers rails can comprise steel, aluminum, or other materials suitable for safely securing a vehicle seat 100 to a vehicle. Such other materials can comprise various alloys, plastics, etc.

Either of the lower rails can comprise a track on which an upper rail 114 or an upper rail 116 (collectively the “upper rails” or “upper seat rails”) can be slidably attached. In this regard, the lower rails and upper rails can comprise corresponding geometric features such that the upper rails can slide along the X-axis without appreciable movement in the Z or Y-axis. The upper rails can alternatively be referred to as sliders (or a slider with reference to a single upper rail). The upper rails can be configured to support the weight of seat bottom assembly, which can comprise forward or rear lifting mechanisms. The upper rails can comprise steel, aluminum, or other materials suitable for attachment to the lower rails. Such other materials can comprise various alloys, plastics, etc.

A rail stop 106 or rail stop 108 be located at an end of a lower rail 102 or lower rail 104 which can provide a physical barrier to stop sliding of an upper rail 114 or upper rail 116 at an end of the lower rails (e.g., forward end or rear end of the lower rails). Though depicted at only one end of the lower rails, either of a lower rail 102 or a lower rail 104 can comprise a second rail stop, thus preventing an upper rail 114 or an upper rail 116 from extending beyond the geometric limits of either end of either lower rail.

Rail mounting stud 110 or rail mounting stud 112 (collectively the “rail mounting studs”) can be fixed on a side (e.g., bottom side) of a lower rail 104 or lower rail 102. The rail mounting studs can be, for example, welded, secured with fasteners, stamped, riveted, formed, forged, or otherwise attached to a lower rail 102 or lower rail 104 as would be understood by one skilled in the art. The rail mounting studs can be utilized to attach the lower rails to a vehicle (e.g., floor pan, vehicle structure, vehicle substructure, etc.). It can be appreciated that a vehicle seat 100 can comprise a plurality of rail mounting studs, located anywhere suitable on the lower rails, for safe and secure mounting of the lower rails. The rail mounting studs can be threaded to receive a nut or otherwise configured to enable attachment to a vehicle.

Either of the upper rails can comprise a front link mount 118 or a front link mount 120 (collectively the “front link mounts”). According to an embodiment, the front link mount 118 can be fixed to a side of the upper rail 114. Likewise, the front link mount 120 can be fixed to a side of the upper rail 116. The front link mount 118 can be, for example, welded, secured with fasteners, stamped, riveted, formed, forged, or otherwise attached to the upper rail 114. The front link mount 120 can be similarly attached to the upper rail 116. The front link mount 118 or front link mount 120 can comprise a mounting point for a link arm (e.g., submarine link arm 166 or submarine link arm 168, respectively, which will be further discussed in greater detail below). A mounting point of the front link mount 118 or front link mount 120 can comprise a stud, mounting post, hole, threaded hole, etc., as would be required to have rotatably attached thereto a bracket, arm, link, etc.

Other embodiments can comprise upper rails that do not have separate front link mounts, and instead have upper rails that comprise therein a stud, mounting post, hole, threaded hole, etc., as would be required to have rotatably attached thereto a bracket, arm, link, etc. Such embodiments can comprise a reinforced (e.g., thicker) section of a respective upper rail for increased rigidity and strength.

Either of the upper rails can further comprise a pullback mount 122 or a pullback mount 124 (collectively the “pullback mounts”). According to an embodiment, the pullback mount 122 can be fixed to a side (e.g., top side) of the upper rail 114. Likewise, the pullback mount 124 can be fixed to a side of the upper rail 116. The pullback mount 122 or pullback mount 124 can comprise a mounting point for a link arm (e.g., pullback arm 156 or pullback arm 158, respectively, which will be further discussed in greater detail below). A mounting point of the pullback mount 122 or pullback mount 124 can comprise a stud, mounting post, rivet hole, threaded hole, etc., as would be required to have rotatably attached thereto a bracket, arm, link, etc.

Other embodiments can comprise upper rails that do not have separate pullback mounts, and instead have upper rails that comprise therein a stud, mounting post, hole, threaded hole, etc., as would be required to have rotatably attached thereto a bracket, arm, link, etc. Such embodiments can comprise a reinforced (e.g., thicker) section of a respective upper rail for increased rigidity and strength.

Slide actuator 126 can be coupled to an upper rail 114 or upper rail 116 (or to both, as depicted herein). The slide actuator 126 can comprise an electric motor for electromechanically sliding the upper rails relative to the lower rails. According to an embodiment, a rack and pinion configuration can be utilized in order to translate rotational motion output by the slide actuator 126 into linear motion of the upper rails, relative to the lower rails. In this regard, a lower rail 102 or lower rail 104 (or both) could comprise a rack, thus enabling a pinion of the slide actuator 126 to move the upper rails relative to the lower rails along the X-axis. Other configurations such as ball screw, roller pinion, etc. can be utilized in order to propel the upper rails relative to the lower rails by the slide actuator 126.

It can be an object of the slide actuator 126 to synchronize movement of the upper rails relative to each other (e.g., upper rail 114 moves same distance at, at same rate, at same time as upper rail 116).

Slide actuator 126 need not comprise an electric motor. Other embodiments can comprise pneumatic actuators or other types of actuators. Further embodiments are not power-assisted, and instead utilize manual operation by, for example, a user of the vehicle seat 100. In this regard, the upper rails can be slidably engaged or disengaged with the lower rails by, for example, a pin or other mechanism for enabling/disabling motion as would be understood by one skilled in the art. Manual actuation can be operated, for instance, by a lever or latch operated by a user of the vehicle seat 100.

Turning now to FIG. 3, there is illustrated a side member 128 coupled to the lower rail 104. Additionally, a side member 130 is coupled to the lower rail 102. The side member 128 can be, for example, welded, secured with fasteners, stamped, riveted, formed, forged, or otherwise attached to the lower rail 104. The side member 130 can be similarly attached to the lower rail 102.

The side member 128 can comprise an upper channel 134 located near an edge of the side member 128. The side member 128 can further comprise a lower channel 138 substantially beneath the upper channel 134. Likewise, side member 130 can comprise an upper channel 132 located near an edge of the side member 130. The side member 130 can further comprise a lower channel 136 substantially beneath the upper channel 132.

The side member 128 can further comprise a seat back mount 142 and a lifting mechanism mount 146. Likewise, the side member 130 can comprise a seat back mount 140 and a lifting mechanism mount 144.

The seat back mount 140 or seat back mount 142 can be utilized to rotatably attach a seat back (e.g., seat back 148) to the side member 130 or side member 128, respectively, and preferably to both. The seat back mount 140 or seat back mount 142 can comprise a stud, mounting post, hole, threaded hole, etc., as would be required to have rotatably attached thereto a seat back (e.g., seat back 148).

The lifting mechanism mount 144 or lifting mechanism mount 146 can be utilized to rotatably attach a lifting mechanism (e.g., lifting mechanism assembly 173) to the side member 130 or side member 128, respectively. The lifting mechanism mount 144 or lifting mechanism mount 146 can comprise a stud, mounting post, hole, threaded hole, etc., as would be required to have rotatably attached thereto a lifting mechanism (e.g., lifting mechanism assembly 173).

The side member 128 or side member 130 can comprise steel, aluminum, or other materials suitable for safely securing a vehicle seat back (e.g., seat back 148), lifting mechanism assembly 173, or other components to the lower rails or otherwise to a vehicle. Such other materials can comprise various alloys, plastics, etc.

Turning now to FIG. 4, a seat back 148 comprising a seat back upper bracket 150 is depicted. The seat back 148 can be rotatably attached to the side member 128 and side member 130 via the seat back mount 142 and seat back mount 140.

The seat back upper bracket 150 can enable attachment of an upper seat cushion 180, a headrest, or otherwise further enable assembly of the vehicle seat 100.

The seat back 148 can comprise a seat back pullback mount 152 and a seat back pullback mount 154 (collectively the “seat back pullback mounts”). The seat back pullback mounts can comprise a stud, mounting post, hole, threaded hole, etc., as would be required to have rotatably attached thereto a link, arm, bracket, etc. (e.g., pullback arm 156 or pullback arm 158 as later depicted and described).

As illustrated in FIG. 5, a pullback arm 156 can be rotatably attached to the seat back pullback mount 152. The pullback arm 156 can also be rotatably attached to the pullback mount 122. Likewise, a pullback arm 158 can be rotatably attached to both of a seat back pullback mount 154 and pullback mount 124. The pullback arm 156 or pullback arm 158 (collectively the “pullback arms”) can be bolted, riveted, or otherwise rotatably attached the pullback mount 122, pullback mount 124, seat back pullback mount 152, or seat back pullback mount 154. Pullback arms can alternatively be referred to as a singular linkage or plural linkages.

The pullback arms can translate the linear movement of the upper rails (along the X-axis) into rotational movement of the seat back 148. In this regard, sliding of the upper rails can cause the seat back 148 to concurrently rotate about the seat back mount 140 and seat back mount 142.

The pullback arms can comprise steel, aluminum, or other suitable materials. Such other materials can comprise various alloys, plastics, etc.

Turning now to FIG. 6, there is additionally illustrated a submarine tube 160 (e.g., connecting rod or connecting tube), a submarine bracket 162 (e.g., mounting bracket), and a submarine bracket 164 (e.g., mounting bracket). The submarine bracket 162 can be rotatably attached to the lower rail 102. According to an embodiment, the submarine bracket 162 can be attached to the lower rail 102 as fastened through the rail stop 106. In this regard, the rail stop 106 can comprise a hole which can receive a bolt, rivet, screw, etc. to mount the submarine bracket 162. Likewise, the submarine bracket 164 can be rotatably attached to the lower rail 104. According to an embodiment, the submarine bracket 164 can be attached to the lower rail 104 as fastened through the rail stop 108. In this regard, the rail stop 108 can comprise a hole which can receive a bolt, rivet, screw, etc. to mount the submarine bracket 164.

The submarine bracket 162 or submarine bracket 164 can comprise steel, aluminum, or other suitable materials. Such other materials can comprise various alloys, plastics, etc.

The submarine tube 160 can be coupled to the submarine bracket 162 and the submarine bracket 164. According to one embodiment, the submarine tube 160 is rotatably attached to the submarine bracket 162 and the submarine bracket 164. According to another embodiment, the submarine tube 160 is non-rotatably fixed to the submarine bracket 162 and the submarine bracket 164, thus preventing rotation of the submarine tube 160 relative to the submarine bracket 162 or submarine bracket 164.

With reference to FIG. 7, submarine link arm 166 and submarine link arm 168 are illustrated. According to an embodiment, the submarine link arm 166 is rotatably coupled at one end to the submarine bracket 162 and rotatably coupled at another end, opposite the one end, to the front link mount 118. Likewise, the submarine link arm 168 is rotatably coupled at one end to the submarine bracket 164 and rotatably coupled at another end, opposite the one end, to the front link mount 120. In this regard, Z-axis height of the submarine tube 160 changes concurrently with an X-axis positional change of the upper rails. For instance, when the upper rails slide along the X-axis toward the rear of the vehicle seat 100, the submarine tube 160 lowers along the Z-axis. Additionally, the seat back 148 concurrently rotates into a folded position when the upper rails slide along the X-axis toward the rear of the vehicle seat 100. This way, a single actuation (e.g., by slide actuator 126), can both lower the submarine tube 160 and fold down the seat back 148 by moving the upper rails, and can likewise raise both lower the submarine tube 160 and unfold the seat back 148 into a seating position by moving the upper rails.

The submarine link arm 166 or submarine link arm 168 can comprise steel, aluminum, or other suitable materials. Such other materials can comprise various alloys, plastics, etc.

Collectively, the submarine tube 160, submarine bracket 162, submarine bracket 164, submarine link arm 166, and submarine link arm 168 can be referred to as a front lifting assembly, a lower seat lifting mechanism, a seat lifting assembly, a seat stowing mechanism, or a seat folding mechanism. This front lifting assembly can provide crash safety and structural rigidity for the vehicle seat 100. Components of the front lifting assembly can comprise steel, aluminum, or other suitable materials. Such other materials can comprise various alloys, plastics, etc.

FIG. 8 additionally depicts a lifting mechanism assembly 173. The lifting mechanism assembly 173 can alternatively be referred to as a lower seat lifting mechanism or a seat lifting assembly. The lifting mechanism assembly 173, which will be later described in greater detail, comprises an outer lifting arm 170 (e.g., outer arm), outer lifting arm 172 (e.g., outer arm), a lifting mechanism connecting tube 174 (e.g., connecting tube or crossmember), an inner lifting arm 175 (e.g., inner arm), and an inner lifting arm 177 (e.g., inner arm). A seat belt buckle assembly can be rotatably attached to the outer lifting arm 170, the outer lifting arm 172, or to a different component of the lifting mechanism 173 or vehicle seat 100. Components of the lifting mechanism assembly 173 can comprise steel, aluminum, or other suitable materials. Such other materials can comprise various alloys, plastics, etc.

FIG. 9 includes the seat pan 178. The seat pan 178 can comprise a plurality of seat springs 188. The plurality of seat springs (collectively a “spring mat”) can be fixed to the seat pan 178 and, can rest on the submarine tube 160. The spring mat can be additionally rotatably attached to the lifting mechanism connecting tube 174. The springs 188 can be tensioned, for example, between the lifting mechanism assembly 173 and the seat pan 178. the According to an example, the seat springs 188 are shaped to conform to the exterior surface of the lifting mechanism connecting tube 174, such that linear motion of the spring mat relative to the lifting mechanism assembly 173 is prevented and only rotational movement about the lifting mechanism connecting tube 174 is enabled. It can be appreciated that a height of the seat pan 178 can change concurrently with the submarine tube 160 or lifting mechanism connecting tube 174.

The seat pan 178 can be manufactured from plastic, sheet metal, or other materials that can support a seat cushion and vehicle seat occupant.

It can be further appreciated that the submarine tube 160 can move along the X-axis relative to the spring mat. This is because the submarine tube 160 experiences some small positional change along the X-axis or Y-axis during a height change along the Z-axis, for instance, when the vehicle seat 100 is folded or unfolded. The above described configuration enables the submarine tube 160 to roll or slide against the spring mat during folding or unfolding of the vehicle seat 100. In this regard, the seat pan 178 is enabled to move in a substantially vertical direction with respect to the Z-axis, with no movement along the Y-axis and little movement along the X-axis.

With reference to FIG. 10, upper seat cushion 180 and lower seat cushion 182 are introduced. It is to be appreciated, however, that upper seat cushion 180 and lower seat cushion 182 are depicted in FIG. 10 as outline, or “skeletons” representative of seat cushions, making the majority of each transparent for illustrative purposes. It is further noted that other figures depict the upper seat cushion 180 and lower seat cushion 182 as entire cushions, and it is to be understood that the outlines/skeletons of FIG. 10 herein can represent the same cushions. The upper seat cushion 180 can be attached to the seat back 148. Similarly, the lower seat cushion 182 can be attached to the seat pan 178. Collectively, the seat pan 178, spring mat, or lower seat cushion 182 can be referred to as a lower seat assembly or a seat bottom.

Turning now to FIG. 11, there is illustrated a side-view of a vehicle seat 100. In FIG. 11, the upper seat cushion 180 and lower seat cushion 182 are depicted as entire cushions instead of as outlines/skeletons like in FIG. 10. It can be appreciated herein that the upper seat cushion 180 and lower seat cushion 182 do not prevent the seat back 148 from folding into a substantially horizontal position. Further, the upper seat cushion 180 or lower seat cushion 182 can compress as necessary to permit further folding.

Additionally, it can be appreciated in FIG. 11 that the outer lifting arm 172 can be rotatably attached to the side member 128 and is additionally supported or guided by the upper channel 134 or lower channel 138. In this regard, the outer lifting arm 172 can comprise a stud to be received in the lower channel 138 which can provide additional support for the lifting mechanism assembly 173. This slidable engagement between the outer lifting arm 172 and the lower channel 138 can additionally limit or substantially prevent movement along the Y-axis or X-axis in order to provide additional stability of the lifting mechanism assembly 173.

With reference to FIG. 12, the vehicle seat 100 is depicted in a partially-unfolded position. In FIG. 12, the seat pan clip 184 can be viewed. The seat pan clip 184 (and seat pan clip 186 which will also be later discussed) removably secure the seat pan 178 to the submarine tube 160. Though preferably plastic, the seat pan clips can comprise steel, aluminum, or other suitable materials. Such other materials can comprise various alloys, plastics, etc.

Movement of the lifting mechanism assembly 173 can also be herein appreciated, especially in comparison with FIG. 11. In FIG. 12, the lifting mechanism assembly 173 (outer lifting arm 172 viewable) is in a raised position, as compared to FIG. 11 in which the lifting mechanism assembly 173 is in a lowered position.

FIG. 13 illustrates the seat pan clip 184 and seat pan clip 186 (collectively the “seat pan clips”) in unlocked positions. When unlocked, the seat pan 178 can be lifted away from the submarine tube 160 while still rotatably attached to the lifting mechanism assembly 173.

FIG. 14 illustrates the seat pan 160 lowered onto the submarine tube 160 with the seat pan clips still in unlocked positions. FIG. 15 illustrates the seat pan clips rotated into locked positions. Locking mechanisms, such as a snap lock or other reversibly lockable mechanisms, can be utilized to removably secure the seat pan clip 184 or seat pan clip 186 in a locked position whereby the seat pan 178 is secured to the submarine tube 160. In this regard, when the seat pan clips are locked, movement of the seat pan 178 along the Z-axis, relative to the submarine tube, is restricted. The seat pan clips can still allow for movement of the submarine tube 160 along the X-axis, as the submarine tube 160 rolls or slides against the spring mat and against the seat pan clips. This enables the submarine tube 160 to raise or lower the seat pan 178.

Some embodiments may utilize permanently locked seat pan clips. In this regard, the seat pan clips may not be unlockable once fixed in a locked position against the submarine tube 160.

Turning now to FIG. 16, an alternate view of the vehicle seat 100 is provided. From this vantage point, the lifting mechanism assembly 173 can be appreciated in greater detail. It can be realized that the outer lifting arm 170 is rotatably attached to the side member 130 by the lifting mechanism mount 144. The inner lifting arm 175 is also rotatably attached to the side member 130 by the lifting mechanism mount 144. A lifting connector 196 also attaches the outer lifting arm 170 to the inner lifting arm 175. This lifting connector 196 passes through the upper channel 132. This way, the lifting mechanism assembly 173 can pivot about the lifting mechanism mount 144 while guided and with X-axis movement confined by the upper channel 132. In this regard, the diameter of the lifting connector 196 can be substantially similar to a width of the upper channel 132, such that motion is substantially restricted to only along the arc of the opening of the upper channel 132.

Likewise, the outer lifting arm 172 is rotatably attached to the side member 128 by the lifting mechanism mount 146. The inner lifting arm 177 (later depicted) is also rotatably attached to the side member 128 by lifting mechanism mount 146. A lifting connector 194 also attaches the outer lifting arm 172 to the inner lifting arm 177. The lifting connector 194 passes through the upper channel 134. This way, the lifting mechanism assembly 173 can pivot about the lifting mechanism mount 146 while guided and with X-axis movement confined by the upper channel 134. In this regard, the diameter of the lifting connector 194 can be substantially similar to a width of the upper channel 134, such that motion is substantially restricted to only along the arc of the opening of the upper channel 134.

In FIG. 16 the lifting mechanism 173 is depicted in a lowered position while the vehicle seat 100 is in a folded position. For example, In FIG. 16, the lifting connector 194 and lifting connector 196 are located at the bottoms of the upper channels 134 and 132, respectively.

Additionally, in FIG. 16, the submarine tube 160 is depicted in a lowered position. This way, the seat pan 178 is also lowered into a lowered position, such that the bottom of the seat pan is substantially coplanar with the bottom of the lower rails. This way, in a vehicular application, the bottom of the seat pan 178 could be fully, or at least substantially, lowered to the floor of a vehicle in which the vehicle seat 100 is installed.

FIG. 17 illustrates the vehicle seat 100 in a partially folded position. In this figure, it can be appreciated that the submarine tube 160 and lifting mechanism assembly 173 rise, thus lifting the seat pan 178 from a lowered position (as in FIG. 16) while the seat back 148 unfolds into a seating position.

FIG. 18 illustrates the vehicle seat 100 in a fully unfolded, or seating position. In this regard, the submarine tube 160 and lifting mechanism assembly 173 have reached a maximum height and the seat back 148 rests against recline stop 198 and recline stop 200.

FIGS. 19-21 are provided with the seat pan 178 depicted as semi-transparent in order to appreciate the kinematic motion of various components of the vehicle seat 100 in various positions. It is noted, however, that the seat pan 178 can substantially or completely cover an entirety of the spring mat.

Turning now to FIG. 22, operation of the lifting mechanism assembly 173 can be more easily appreciated. An upper rail riser 190 is fixed atop the upper rail 116. Likewise, an upper rail riser 191 can be fixed atop the upper rail 114 (e.g., see FIG. 26). The upper rail riser 190 or upper rail riser 191 can comprise steel, aluminum, or other suitable materials. Such other materials can comprise various alloys, plastics, etc.

The upper rail riser 191 is positioned beneath the inner lifting arm 177, such that sliding of the upper rail 116 cause the inner lifting arm 177 to rotate. In this regard, the lifting arm 177 can “ramp up” the upper rail riser 190 to facilitate such motion. This motion can be appreciated in FIG. 23, as the vehicle seat 100 moves from a substantially folded position in FIG. 23A towards partially unfolded in FIG. 23D. This motion is continued in FIG. 24, from FIG. 24A to FIG. 24D. Finally, in FIG. 25, the vehicle seat 100 is nearly in seating position. The inner lifting arm 177 is at a maximum height atop the upper rail riser 190. FIG. 26 provides an alternate view of the lifting mechanism assembly 173.

Turning back to FIG. 22, recline stop 200 can be appreciated. The recline stop 200 can comprise a portion of the side member 128 of which the seat pullback mount 154 or the seat back 148 can contact when the vehicle seat 100 is fully unfolded into a seating position. In this regard, recline stop 200 can provide additional support for the seat back 148 and prevent over-extension of the seat back 148. Other embodiments can comprise a recline stop 200 as a separate component, attached to the side member 128.

Likewise, as can be appreciated in FIG. 26, the recline stop 198 can comprise a portion of the side member 130 on which the seat pullback mount 152 or the seat back 148 can contact when the vehicle seat 100 is fully unfolded into a seating position. In this regard, recline stop 198 can provide additional support for the seat back 148 and can prevent over-extension of the seat back 148.

With reference to FIG. 27, a method for making a collapsible seat base is described herein. At 2702, a first upper seat rail (e.g., upper rail 114) is slidably attached to a first lower seat rail (e.g., lower rail 102). At 2704, a second upper seat rail (e.g., upper rail 116) is slidably attached to a second lower seat rail (e.g., lower rail 104). At 2706, a first submarine bracket (e.g., submarine bracket 162) is pivotally attached to an inner side of the first lower seat rail at a first end of the submarine bracket. At 2708, a second submarine bracket (e.g., submarine bracket 164) is pivotally attached to an inner side of the second lower seat rail at a first end of the second submarine bracket. At 2710, a first end of a submarine tube (e.g., submarine tube 160) is attached to the first submarine bracket at a second end of the first submarine bracket, opposite the first end of the first submarine bracket, and a second end of the submarine tube is attached to the second submarine bracket at a second end of the second submarine bracket, opposite the first end of the second submarine bracket. At 2712, a first linkage (e.g., submarine link arm 166) is pivotally attached to the first submarine bracket at a first end of the first linkage and the first linkage is pivotally attached to the first upper seat rail at a second end of the first linkage. At 2714, a second linkage (e.g., submarine link arm 168) is pivotally attached to the second submarine bracket at a first end of the second linkage, and the second linkage is pivotally attached to the second upper seat rail at a second end of the second linkage.

FIG. 27, as described above illustrates respective methods or systems in accordance with certain aspects of this disclosure. While, for purposes of simplicity of explanation, the methods or systems are shown and described as a series of acts, it is to be understood and appreciated that this disclosure is not limited by the order of acts, as some acts may occur in different orders and/or concurrently with other acts from those shown and described herein. For example, those skilled in the art will understand and appreciate that methods can alternatively be represented as a series of interrelated states or events, such as in a state diagram. Moreover, not all illustrated acts may be required to implement methods in accordance with certain aspects of this disclosure.

The above description includes non-limiting examples of the various embodiments. It is, of course, not possible to describe every conceivable combination of components or methods for purposes of describing the disclosed subject matter, and one skilled in the art may recognize that further combinations and permutations of the various embodiments are possible. The disclosed subject matter is intended to embrace all such alterations, modifications, and variations that fall within the spirit and scope of the appended claims.

With regard to the various functions performed by the above described components, devices, circuits, systems, etc., the terms (including a reference to a “means”) used to describe such components are intended to also include, unless otherwise indicated, any structure(s) which performs the specified function of the described component (e.g., a functional equivalent), even if not structurally equivalent to the disclosed structure. In addition, while a particular feature of the disclosed subject matter may have been disclosed with respect to only one of several implementations, such feature may be combined with one or more other features of the other implementations as may be desired and advantageous for any given or particular application.

The terms “exemplary” and/or “demonstrative” as used herein are intended to mean serving as an example, instance, or illustration. For the avoidance of doubt, the subject matter disclosed herein is not limited by such examples. In addition, any aspect or design described herein as “exemplary” and/or “demonstrative” is not necessarily to be construed as preferred or advantageous over other aspects or designs, nor is it meant to preclude equivalent structures and techniques known to one skilled in the art. Furthermore, to the extent that the terms “includes,” “has,” “contains,” and other similar words are used in either the detailed description or the claims, such terms are intended to be inclusive—in a manner similar to the term “comprising” as an open transition word—without precluding any additional or other elements.

The term “or” as used herein is intended to mean an inclusive “or” rather than an exclusive “or.” For example, the phrase “A or B” is intended to include instances of A, B, and both A and B. Additionally, the articles “a” and “an” as used in this application and the appended claims should generally be construed to mean “one or more” unless either otherwise specified or clear from the context to be directed to a singular form.

The term “set” as employed herein excludes the empty set, i.e., the set with no elements therein. Thus, a “set” in the subject disclosure includes one or more elements or entities. Likewise, the term “group” as utilized herein refers to a collection of one or more entities.

The description of illustrated embodiments of the subject disclosure as provided herein, including what is described in the Abstract, is not intended to be exhaustive or to limit the disclosed embodiments to the precise forms disclosed. While specific embodiments and examples are described herein for illustrative purposes, various modifications are possible that are considered within the scope of such embodiments and examples, as one skilled in the art can recognize. In this regard, while the subject matter has been described herein in connection with various embodiments and corresponding drawings, where applicable, it is to be understood that other similar embodiments can be used or modifications and additions can be made to the described embodiments for performing the same, similar, alternative, or substitute function of the disclosed subject matter without deviating therefrom. Therefore, the disclosed subject matter should not be limited to any single embodiment described herein, but rather should be construed in breadth and scope in accordance with the appended claims below. 

What is claimed is:
 1. A seat folding mechanism comprising: a first mounting bracket, rotatably attached to a base at a first end of the first mounting bracket; a first end of a connecting rod attached at a second end of the first mounting bracket, opposite the first end of the first mounting bracket; a second mounting bracket, parallel to the first mounting bracket, rotatably attached to the base at a first end of the second mounting bracket, wherein the connecting rod is attached at a second end of the connecting rod to a second end of the second mounting bracket, opposite the first end of the second mounting bracket; a first link arm, rotatably attached at a first end of the first link arm to the first mounting bracket, adjacent to the second end of the first mounting bracket; a first slider, slidably attached to the base, wherein a second end of the first link arm, opposite the first end of the first link arm, is rotatably attached to the first slider; a second link arm, rotatably attached at a first end of the second link arm to the second mounting bracket, adjacent to the second end of the second mounting bracket; and a second slider, slidably attached to the base, wherein a second end of the second link arm, opposite the first end of the second link arm, is rotatably attached to the second slider, whereby sliding of the first slider and the second slider causes the connecting rod to move in height direction.
 2. The seat folding mechanism of claim 1, wherein the first slider is parallel to the second slider.
 3. The seat folding mechanism of claim 1, wherein movements of the first slider and the second slider are synchronized, whereby a change in height of the first end of the connecting rod and a change in height of the second end of the connecting rod equally and concurrently occur.
 4. The seat folding mechanism of claim 1, wherein the base comprises a pair of parallel rails.
 5. The seat folding mechanism of claim 4, wherein the first slider slidably moves in a longitudinal direction across a first rail of the pair of parallel rails, and the second slider slidably moves in a longitudinal direction across a second rail of the pair of parallel rails.
 6. The seat folding mechanism of claim 1, wherein the first slider and the second slider are electromechanically actuated, wherein an electric motor causes the first slider and the second slider to move in a longitudinal direction.
 7. The seat folding mechanism of claim 1, wherein the first link arm is attached to the first mounting bracket on an outer side of the first mounting bracket, and the second link arm is attached to the second mounting bracket on an outer side of the second mounting bracket.
 8. The seat folding mechanism of claim 1, wherein the first link arm is attached to the first slider on an inner side of the first slider, and the second link arm is attached to second slider on an inner side of the second slider.
 9. A seat stowing mechanism comprising: a seat base comprising a pair of seat rails; a first mounting bracket, rotatably coupled at a first end of the first mounting bracket to a first seat rail of the pair of seat rails; a first end of a connecting rod coupled to the first mounting bracket at a second end of the first mounting bracket, opposite the first end of the first mounting bracket; a second mounting bracket, parallel to the first mounting bracket, rotatably coupled at a first end of the second mounting bracket to a second seat rail of the pair of seat rails, wherein the connecting rod is coupled at a second end of the connecting rod to a second end of the second mounting bracket, opposite the first end of the second mounting bracket; a first link arm, rotatably coupled at a first end of the first link arm to the first mounting bracket, adjacent to the second end of the first mounting bracket; a first slider, slidably coupled to and substantially coplanar with the seat base, wherein a second end of the first link arm, opposite the first end of the first link arm, is rotatably coupled to the first slider; a second link arm, rotatably coupled at a first end of the second link arm to the second mounting bracket, adjacent to the second end of the second mounting bracket; a second slider, slidably coupled to and substantially coplanar with the seat base, wherein a second end of the second link arm, opposite the first end of the second link arm, is rotatably coupled to the second slider, whereby sliding of the first slider and the second slider causes the connecting rod to move in height direction; and a seat pan disposed atop the connecting rod.
 10. The seat stowing mechanism of claim 9, wherein the seat pan comprises a spring mat, and wherein the spring mat contacts the connecting rod.
 11. The seat stowing mechanism of claim 10, further comprising a submarine tube in contact with the spring mat, and wherein the submarine tube moves relative to the spring mat in response to a height change of the submarine tube.
 12. The seat stowing mechanism of claim 10, wherein the spring mat comprises a group of tensioned metal wires.
 13. The seat stowing mechanism of claim 9, further comprising: a seat cushion disposed atop the seat pan.
 14. The seat stowing mechanism of claim 9, wherein a first distance between an outer surface of the first seat rail and an outer surface of the second seat rail is less than a second distance between a first inner side of the seat pan and a second inner side of the seat pan, wherein the first inner side of the seat pan is substantially coplanar with the outer surface of the first seat rail and the second inner side of the seat pan is substantially coplanar with the outer surface of the second seat rail.
 15. The seat stowing mechanism of claim 9, wherein a bottom surface of the seat pan is substantially coplanar with a bottom surface of the seat base when the seat pan is in a lowered position.
 16. A method for making a collapsible seat base, the method comprising: slidably attaching a first upper seat rail to a first lower seat rail; slidably attaching a second upper seat rail to a second lower seat rail; pivotally attaching a first submarine bracket to an inner side of the first lower seat rail at a first end of the first submarine bracket; pivotally attaching a second submarine bracket to an inner side of the second lower seat rail at a first end of the second submarine bracket; attaching a first end of a submarine tube to the first submarine bracket at a second end of the first submarine bracket, opposite the first end of the first submarine bracket, and attaching a second end of the submarine tube to the second submarine bracket at a second end of the second submarine bracket, opposite the first end of the second submarine bracket; pivotally attaching a first linkage to the first submarine bracket at a first end of the first linkage and pivotally attaching the first linkage to the first upper seat rail at a second end of the first linkage; and pivotally attaching a second linkage to the second submarine bracket at a first end of the second linkage and pivotally attaching the second linkage to the second upper seat rail at a second end of the second linkage.
 17. The method of claim 16, further comprising: disposing a seat pan comprising a spring mat atop the submarine tube.
 18. The method of claim 17, further comprising: pivotally attaching a clip to the seat pan, whereby rotation of the clip removably pinches the submarine tube between the spring mat and the clip.
 19. The method of claim 16, wherein the pivotal attachment between the first submarine bracket and the first lower seat rail comprises a first rail stop, wherein the first rail stop prevents the first upper seat rail from sliding past an end of the first lower seat rail comprising the first rail stop.
 20. The method of claim 16, further comprising: attaching a crossmember to an inner surface of the first upper seat rail at a first end of the crossmember; and attaching the crossmember to an inner surface of the second upper seat rail at a second end of the crossmember, opposite the first end, whereby the first upper seat rail and the second upper seat rail are slidably synchronized by the crossmember. 